Blood is a specialized bodily fluid that contains red blood cells, white blood cells, plasma, and platelets. It is essential for transporting nutrients, oxygen, and waste as well as fighting infection and regulating body temperature. In addition, fetal DNA is present in maternal blood and is used to screen for genetic disorders such as aneuploidy.

Whole human maternal blood is collected from aneuploidy positive pregnancies verified by serum protein biomarkers at varying gestations and demographics in 10 mL aliquots into sterile Streck tubes. Maternal donors are recallable after 8 weeks of prior donation. IDS testing can be requested for each donor.